US2552518A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Mechanism for draining accumulated moisture from storage tanks
Assignee: Individual
•
Filing: 1945-10-29
•
Granted: 1951-05-15
•
Expires: 1965-10-29
Abstract
No abstract record available.
Inventors
- 👤 Churchman Nellie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:38
CPC Classifications
F; F04; F04B; F04B49/00; F04B49/02; F04B49/022; F04B39/00; F04B39/16; Y; Y10; Y10T; Y10T137/00; Y10T137/2931; Y10T137/3003; Y10T137/3102
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US261602A
Cited
US1167815A
Cited
US2128206A
Cited
US2111232A
Cited
US2256565A
Cited
US2330027A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-14 | 1954-11-13 | 1955-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-14 | 1958-11-13 | 1959-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-14 | 1962-11-13 | 1963-05-15 | $7700.00 | Window Closed / Lapsed |